Review
Engineering, Environmental
Oraleou Sangue Djandja, Lin-Xin Yin, Zhi-Cong Wang, Pei-Gao Duan
Summary: This article systematically reviews recent findings on hydrothermal treatments of Municipal Sewage Sludge, highlighting the related chemical reactions and the impact of reaction parameters. Suggestions are made for optimizing the applications of end products, and potential challenges for future hydrothermal treatments are discussed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Review
Engineering, Environmental
Antonello Tangredi, Cristian Barca, Jean-Henry Ferrasse, Olivier Boutin
Summary: This review explores the potential of phosphorus (P) recovery from sewage sludge through hydrothermal processes by analyzing over 60 recent studies. The results indicate that temperature is the most influential parameter for P conversion pathways, with higher temperature promoting solid P recovery yield, organic P mineralization, and the conversion of non-apatitic P into apatitic P. Increasing reaction time and adjusting alkalinity and reactant composition also impact P recovery. The findings provide key insights for researchers and practitioners in sewage sludge management to enhance P and biofuel recovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Agricultural Engineering
Weijin Zhang, Qingyue Chen, Jiefeng Chen, Donghai Xu, Hao Zhan, Haoyi Peng, Jian Pan, Mikhail Vlaskin, Lijian Leng, Hailong Li
Summary: Hydrothermal treatment (HTT) is a promising technology for biomass valorization, and machine learning (ML) has been widely applied to predict and optimize the production from HTT. This review comprehensively analyzed the application of ML for HTT of biomass and summarized ML-aided HTT prediction of yield, compositions, and physicochemical properties of derived products. Future prospects were proposed to enhance predictive performance, mechanistic interpretation, process optimization, data sharing, and model application during ML-aided HTT.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Xi Zhang, Lulu Zhan, Min Lin, Yizhen Zeng, Rui Li, Yulong Wu
Summary: This study aimed to find the most optimized and applicable co-hydrothermal conversion process. The results showed that the combination of hydrothermal carbonization as a pretreatment of sludge and co-hydrothermal liquefaction of sludge and microalgae can achieve higher bio-oil yield and lower acid content. Furthermore, combining hydrothermal carbonization with co-hydrothermal liquefaction can reduce environmental impacts and improve environmental stability.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Inorganic & Nuclear
Yan Zheng, Bo Zhang
Summary: The study investigates the potential of using wastewater from sewage sludge dewatering as a solvent to convert microalgae into biocrude. Results show higher biocrude yield in wastewater solvent compared to pure water, indicating potential for increased production. The enhancing mechanism of wastewater solvent on liquefaction is discussed, highlighting the significance of this recycling strategy for utilization of organic wastewater in sewage sludge treatment.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Review
Agricultural Engineering
Daniel Lachos-Perez, Paulo Cesar Torres-Mayanga, Ederson R. Abaide, Giovani L. Zabot, Fernanda De Castilhos
Summary: Hydrothermal liquefaction (HTL) and Hydrothermal Carbonization (HTC) are environmentally friendly and technologically innovative thermochemical processes that show significant differences in operation parameters, technical issues, and main products. Environmental and techno-economic assessments can evaluate the environmental sustainability and economic implications of these techniques. Perspectives and challenges are explored, along with integration approaches for hydrothermal valorization pathways and biorefining.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jianwei Zhang, Yuting Wang, Xutong Wang, Wenzhu Wu, Xiaoqiang Cui, Zhanjun Cheng, Beibei Yan, Xiaoe Yang, Zhenli He, Guanyi Chen
Summary: This study investigated the behavior of Cd and Zn in the hydrothermal conversion of hyperaccumulator biomass using different solvents, and found that low temperature and HCl addition facilitated the removal of Cd/Zn from the solid phase. The leaching risk of Cd and Zn was significantly reduced by hydrothermal conversion, and the addition of HCl enhanced the immobilization of Zn while increasing the mobility of Cd.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Energy & Fuels
Xuesong Liu, Jun Shen, Yun Guo, Sha Wang, Bin Chen, Lei Luo, Hai Zhang
Summary: This paper comprehensively reviews the thermochemical conversion techniques of kitchen waste, including pyrolysis, gasification, hydrothermal carbonization, hydrothermal liquefaction, and torrefaction. The principles and influential factors of each technique are introduced, and future developments are discussed.
Review
Agricultural Engineering
Yujie Fan, Ursel Hornung, Nicolaus Dahmen
Summary: This article reviews the latest research progress of hydrothermal liquefaction (HTL) technology in the fields of sewage sludge treatment and renewable energy production. It evaluates the fundamentals of HTL, the influence of key operation parameters, and the main challenges and upgrading methods. It also discusses opportunities and strategies such as pretreatment, co-liquefaction, and post-application. The results of continuous-flow tests of sewage sludge are summarized. Finally, considerations and recommendations for improving the economic feasibility of the HTL process are proposed.
BIOMASS & BIOENERGY
(2022)
Review
Green & Sustainable Science & Technology
Alejandro Ayala-Cortes, Pedro Arcelus-Arrillaga, Marcos Millan, Camilo A. Arancibia-Bulnes, Patricio J. Valades-Pelayo, Heidi Isabel Villafan-Vidales
Summary: Hydrothermal processes are attractive for transforming biomass mixtures with high water content, utilizing water's properties as a reaction medium. However, the main challenge lies in the high energy requirement for heating reactants, prompting the integration of renewable energy sources to reduce consumption.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Energy & Fuels
Yuliya Kulikova, Olga Babich, Anna Tsybina, Stanislav Sukhikh, Ivan Mokrushin, Svetlana Noskova, Nikolaj Orlov
Summary: This article discusses the hydrothermal liquefaction (HTL) of sewage sludge as an analogue of the natural oil formation process. The study finds similarities in the physicochemical composition between both types of sludge and type II kerogen. The research also tests the effectiveness of catalysts containing metal ions, zeolite, and aluminum oxide, identifying NiSO4 as a catalyst that significantly increases biocrude yield and reduces oxygen content.
Article
Multidisciplinary Sciences
Zhuangzhuang Liu, Zhiwei Yan, Fen Liu, Jun Fang
Summary: The nitrogen conversion mechanism of swine manure during thermochemical liquefaction was investigated. It was found that increasing the temperature facilitated the cracking of solid nitrogen structures into bio-oil nitrogen. The study also explored the transformation of nitrogen in the biochar and its possible reaction mechanisms.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Guanyu Jiang, Donghai Xu, Botian Hao, Lu Liu, Shuzhong Wang, Zhiqiang Wu
Summary: Rapid economic growth has made the disposal of municipal sludge increasingly important during urbanization acceleration. Among various thermochemical treatment methods, combustion is preferred for rapid and significant volume reduction of sludge, while other methods face challenges in system operation and technological development.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Chemistry, Applied
Farihahusnah Hussin, Nur Nadira Hazani, Munawar Khalil, Mohamed Kheireddine Aroua
Summary: This article provides a systematic review of hydrothermal technology and the life cycle assessment of hydrothermal biomass conversion. The study found that there is limited research on the environmental and economic impacts of hydrothermal biomass conversion, highlighting the need for environmental impact studies to demonstrate the benefits of biomass hydrothermal processing.
FUEL PROCESSING TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Lukasz Sobol, Arkadiusz Dyjakon, Karel Soukup
Summary: Converting raw biomass into valuable products can benefit the environment, economy, and climate change mitigation. However, thermochemical treatment methods can also produce dioxins and furans, which restrict the use of the converted chars.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Xiaoxian Li, Lilong Zhang, Shanshan Wang, Yulong Wu
FRONTIERS IN CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Qingru Shen, Xiaoxian Li, Rui Li, Yulong Wu
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Energy & Fuels
Min Lin, Xi Zhang, Lulu Zhan, Xiaoxian Li, Xianliang Song, Yulong Wu
Summary: An amorphous Co-based catalyst with porous structure and large specific surface area was synthesized and its performance in deoxygenation reaction was investigated. The results showed that the amorphous Co catalyst exhibited a better inhibition of hydrocracking and promoted hydrodeoxygenation selectivity compared to other catalysts. However, the balance between excessive and insufficient hydrogenation was crucial.
Article
Chemistry, Physical
Shanshan Wang, Jingliang Wang, Xiaoxian Li, Mingde Yang, Yulong Wu
Summary: In this study, a catalyst of well-dispersed Ru clusters fixed in N-doped mesoporous hollow carbon spheres (Ru@N-CS) was reported for selective hydrogenation of phenol in mild aqueous conditions, leading to enhanced cyclohexanol productivity.
Article
Energy & Fuels
Xiaoxian Li, Min Lin, Rui Li, Qiang Lu, Mingde Yang, Yulong Wu
Summary: In this study, Ni-based ZSM-22 catalysts were successfully prepared by combining ethanol dispersion with rotary evaporation. The catalyst, denoted as Ni/Z22@E, exhibited improved catalytic activity in palmitic acid deoxygenation compared to the wet-impregnated method. The conversion of palmitic acid reached 98.9%, with a high C16/C15 alkane ratio of 4.07. The stability of the Ni species on the catalyst surface prevented deactivation due to coking or leaching. The mechanism and kinetics of the reaction were analyzed, showing that the ethanol dehydration reaction was the most difficult to occur. The high selectivity for C16 alkanes was attributed to the low activation energy of the hydrodeoxygenation pathway. Additionally, a mechanistic change in the fatty acid deoxygenation reaction was observed at around 240 degrees C, leading to a significant increase in the hydrodecarboxylation pathway.
Article
Engineering, Chemical
Xiaoxian Li, Yuanzhe Gong, Qi Lu, Min Lin, Jian Liu, Yulong Wu
Summary: In this study, hierarchical pore HZSM-5 zeolite was synthesized through alkali treatment, and the effect of Mo and Cu bimetallic loading on the hydrothermal aromatization of stearic acid was investigated. The results showed that the bimetallic loaded catalyst exhibited high activity and improved hydrothermal stability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Lilong Zhang, Ge Meng, Wei Zhang, Xiaoxian Li, Zedong Zhang, Mingde Yang, Yulong Wu, Dingsheng Wang, Yadong Li
Summary: A composite dual-site Ru single-atom/Ru nanoparticle catalyst was designed to efficiently catalyze the hydrogenation of levulinic acid (LA) and the oxidation of 5-hydroxymethyl furfural (HMF) in a specific solvent system, enabling easy separation of the products. This opens up new possibilities for the design of dual-site catalysts to promote the oriented conversion of complex substrates and facilitate product separation.
Article
Engineering, Environmental
Min Lin, Xiaoxian Li, Yuhao Yan, Rui Li, Yulong Wu
Summary: The researchers successfully synthesized nickel nanoparticles encapsulated in carbon, and catalyzed palmitic acid to alkanes through a one-pot method in aqueous phase. The Ni0.5@C0.5 catalyst achieved high conversion efficiency and exhibited superior hydrothermal stability. This work provides a new strategy for obtaining catalysts with excellent hydrothermal stability and improving the catalytic activity of bio-oil deoxygenation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Min Lin, Yuhao Yan, Xiaoxian Li, Rui Li, Yulong Wu
Summary: In recent years, the catalytic preparation of renewable fuels from biomass using palmitic acid as a model compound of bio-oil has been a research focus. However, developing highly active, low-priced, and hydrothermal stable catalysts remains challenging. This study proposes a trace potassium-assisted activation method to improve the hydrothermal hydrogenation/deoxygenation activity of palmitic acid, achieving a significant increase in conversion and yield of alkanes.
FUEL PROCESSING TECHNOLOGY
(2023)
